<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
        <span v-if="item.redirect === 'noRedirect' || index === levelList.length - 1" class="no-redirect">{{ item.meta.title }}</span>
        <a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
      </el-breadcrumb-item>
      <el-breadcrumb-item v-if="currentLabel" :key="currentLabel">
        <span class="no-redirect" v-html="currentLabel"></span>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script setup>
import { ref, computed, watch, onMounted } from 'vue';
import { useRouter, useRoute } from 'vue-router';
import { useTagsViewStore } from '@/stores/tagsView'; // 引入Pinia store

// 使用路由和store
const router = useRouter();
const route = useRoute();
const tagsViewStore = useTagsViewStore();

// 响应式数据
const levelList = ref(null);

// 计算属性
const currentLabel = computed(() => tagsViewStore.currentLabel);

// 生命周期钩子和监听
onMounted(() => {
  getBreadcrumb();
});

watch(
  () => route.path,
  (newPath) => {
    // 如果是重定向页面，不更新面包屑
    if (newPath.startsWith('/redirect/')) {
      return;
    }
    getBreadcrumb();
  },
  { immediate: false }
);

// 方法
const getBreadcrumb = () => {
  // 只显示有meta.title的路由
  let matched = route.matched.filter((item) => item.meta && item.meta.title);
  const first = matched[0];

  if (!isDashboard(first)) {
    matched = [{ path: '/index', meta: { title: '首页' } }].concat(matched);
  }

  levelList.value = matched.filter(
    (item) => item.meta && item.meta.title && item.meta.breadcrumb !== false
  );
};

const isDashboard = (route) => {
  const name = route && route.name;
  if (!name) {
    return false;
  }
  return name.trim() === 'Index';
};

const handleLink = (item) => {
  const { redirect, path } = item;
  if (redirect) {
    router.push(redirect);
    return;
  }
  router.push(path);
};
</script>

<style lang="scss" scoped>
.app-breadcrumb.el-breadcrumb {
  display: inline-block;
  font-size: 14px;
  line-height: 34px;
  margin-left: 8px;

  .no-redirect {
    color: #97a8be;
    cursor: text;
  }
}
</style>